Skin treatment system and method of use

ABSTRACT

A device, a system employing the device, and method of performing skin treatment are provided for skin treatment. The device includes a vacuum head base defining a chamber therein and having a substantially smooth treatment tip attached and extending from an end thereof or integral therewith. The tip has at least one central opening that is open to the chamber, and is adapted to contact the skin and traverse the skin in a substantially nonabrasive manner. A vacuum access opening is provided through a side wall of the vacuum head base and adapted to connect with a source of vacuum. A tissue stop member is located within the chamber. It may have an abrasive surface for exfoliating skin cells, or a smooth surface for traversing the skin without substantial abrasion.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.11/562,892, filed on Nov. 22, 2006, issued as U.S. Pat. No. 7,951,156 onMay 31, 2011, which is a continuation of U.S. patent application Ser.No. 10/393,682, filed on Mar. 19, 2003, issued as U.S. Pat. No.7,658,742 on Feb. 9, 2010, which is a continuation-in-part of U.S.patent application Ser. No. 09/989,992, filed on Nov. 21, 2001, issuedas U.S. Pat. No. 6,695,853 on Feb. 24, 2004, which are incorporated byreference.

BACKGROUND OF THE INVENTION

The present invention relates to the field of dermatology, moreparticularly to skin treatment and conditioning.

Microdermabrasion is a process for removing dead cells from theoutermost layer of the skin (the epidermis) to provide a younger andhealthier looking appearance, remove wrinkles, clean out blocked pores,remove some types of undesirable skin conditions that can develop, andenhance skin tone. The process of microdermabrasion should be performedwith a certain degree of accuracy, so that underlying live layers ofskin tissue are not removed or damaged, but that enough dead cells areremoved to give effective results.

Abrasive tipped devices or rotating brushes and cylinders coated withabrasive particles, such as diamond dust, have been used to remove skinlayers. U.S. Pat. No. 2,712,823 discusses a brush for removing skinblemishes which includes rotating metallic bristles. This device is moreproperly referred to as a dermabrasion device as it is quite aggressivein the amounts and rates of tissues removed. While this type of devicecan be effective for removing gross scarring and keloids such as thoseassociated with burn victims, it can also cause scarring and isdifficult to accurately control with regard to amounts of tissueremoved. As such it is incapable of effectively performing microabrasionas it is currently defined in the art. U.S. Pat. No. 2,867,214 similarlydiscusses a device that employs motor driven stainless steel wirebrushes and cannot effectively perform microdermabrasion.

U.S. Pat. No. 4,241,499 discusses a handheld foot care instrument thatincludes a roughened dermabrasion undersurface to function as a nailfile and skin smoother While this device may be effective for “spottreatment” of calluses, corns, and the like on the foot, it would not bean effective tool for an overall microdermabrasion treatment of the faceor other large area of skin that must be treated with a consistentamount of abrasion over an entire surface.

U.S. Pat. No. 4,378,804 is directed to a skin abrasion device which usesflowing water to rotate an abrasive brush and create a vacuum to removeloosened skin particles. The rotating brush is usually used inconjunction with a liquid detergent or medicinal compound applied to theskin surface being scrubbed.

U.S. Pat. No. 4,572,187 discusses a dermabrasion tool that employs arotary hub and a plurality of flexible strips each having a singleabrasive surface. No means are disclosed for conditioning the skin or ofremoving the dead skin particles from the surface of the skin after theyhave been abraded.

U.S. Pat. No. 4,957,747 discusses the use of powdered aluminum oxide ora liquid topical composition containing suspended aluminum oxide whichis applied to the skin to abrade it. U.S. Pat. No. 5,971,999 discusses amicrodermabrasion system which employs a jet of a mixture of air andreducing crystals, such as aluminum oxide, that is applied to the skinto perform the microdermabrasion. U.S. Pat. No. 5,012,797 discusses theuse of chemicals or ultrasonically oscillating tips to perform abrasion.

U.S. Pat. No. 5,037,431 describes the use of a pressurized jet of aliquid, such as water or sterile saline, to fragment and remove diseasedtissue without harming surrounding healthy tissue. This device operatesin conjunction with vacuum aspiration to remove the liquid andfragmented tissue. A powdered abrasive material may be applied to abradethe skin and removal may be performed using vacuum.

U.S. Pat. No. 6,241,739 discusses a microdermabrasion device thatprovides a tubular treatment tool having a fixed abrasive tip on the endthereof. The abrasive tip has a central opening therethrough, throughwhich a vacuum is applied. When the tip is scraped over the surface ofthe skin, loosened skin particles are vacuumed up through the centralopening. However, a trailing side of the abrasive tip, which trails thecentral opening of the abrasive tip as the tip is moved over the surfaceof the skin, also microabrades the skin surface and leaves a trail ofloosened skin particles which cannot be collected by the vacuum.Additionally, this is a dry system which does not treat the skin duringmicrodermabrasion, which can leave streaking effects on the remainingskin.

While microdermabrasion is often useful, it is sometimes desired toeffect skin treatment utilizing vacuum without abrasion. Variousvacuum-based therapies and devices have been developed to treat the skinand subdermal tissues by way of massage or vacuum action, or acombination of these. One such therapy, as discussed in U.S. Pat. No.3,841,332, involves cup shaped members drawn over the skin in which apulsating vacuum results in a cyclical suction and relaxation action.The therapy is said to promote lymphatic and blood circulation in theareas of suction application. A similar approach is described in U.S.Pat. No. 6,319,211, especially for removing dirt and debris.

In order to facilitate vacuum-based tissue massage or pursue othertreatment goals, or both, a technician utilizing a suction device willoften topically apply a lubricant such a gel, massage oil, or anothersolution. It is also know to utilize suction devices adapted to deliversuch materials through or within the vacuum chamber defined by theworking end of the instrument.

Yet, none of the aforementioned references teach a system thatincorporates the various advantages of the present invention. Forexample, no instrument or system adapted to perform microderabrasionincludes provision for delivery of a therapeutically useful solution atthe abraded site. Instead, useful agents are applied as a lotion, salveor balm, after moving the treatment device or terminating its usealtogether. The present invention offers an improved approach for skintreatment. Particularly, it is a system offering additional or optionaladvantages in the context of vacuum massage, dermal abrasion, or pointdelivery, or a combination of these, of a desired compound.

BRIEF SUMMARY OF THE INVENTION

The present invention is directed to a microdermabrasion device,microdermabrasion system employing the device, and method of performingmicrodermabrasion. It is further directed to vacuum massage devices. Itis especially applicable in either context for therapeutic fluiddelivery.

A device for exfoliating skin cells from an external surface of skinincludes a vacuum head base defining a chamber therein and having asubstantially smooth treatment tip attached and extending from an endthereof or integral therewith. The tip has at least one central openingwhich is open to the chamber, and is adapted to contact the skin andtraverse the skin in a substantially nonabrasive manner. A vacuum accessopening is provided through a side wall of the vacuum head base andadapted to connect with a source of vacuum. An abrasive member may belocated within the chamber, and at least one opening adapted to allowthe flow of one or more fluids through the chamber is provided, whereupon application of vacuum through the vacuum access opening, the fluidsare drawn though the chamber, applied to the skin and taken up throughthe vacuum access opening, and a portion of the skin, targeted by thetip opening, is drawn into the chamber and brought into contact with theabrasive member.

A system for performing microabrasion is provided which includes anapplicator tool having a substantially nonabrasive tip with at least oneopening therethrough, the tip being adapted to contact the skin of apatient; an abrasive member located internally of the applicator tool,and means for applying vacuum through the at least one opening, whereupon application of vacuum a portion of the skin is drawn into contactwith the abrasive member.

Means for delivering fluid through the applicator tool and the at leastone tip opening are provided, for application of the fluid to the skin.

A system for performing microabrasion according to the present inventionincludes an applicator tool having a longitudinal axis and asubstantially nonabrasive tip with at least one opening therethrough. Aconduit extends into the applicator tool and an abrasive member ismounted on an end of the conduit and located internally of theapplicator tool. A vacuum access opening is provided through a side wallof the tool, for connection with a source of vacuum to apply vacuum to atip opening.

The abrasive member or a nonabrasive member seals off the end of theconduit which is located internally of the applicator tool, and at leastone opening is provided through a wall of the conduit. In either case,the member that seals off the conduit is positioned relative to the tipopening to serve as a limiting surface with respect to tissue drawn intothe device by vacuum. The abrasive member is textured to enablemicrodermabrasion. The nonabrasive member preferably has a surfacefinish that avoids such action. Still, the system may be provided with aconduit sealing member of any of a range or spectrum of abrasivenessranging from (substantially) zero, to a maximum level suited formicrodermabrasion. To maximize device utility, the sealing member ispreferably removable or interchangeable with others to offer a varietyof functions or treatment options, or combination of these.

A fluid reservoir adapted to hold treatment liquids may be connected tothe conduit, where, upon application of vacuum through the vacuum accessopening, the treatment liquids are drawn through the conduit anddelivered to the at least one opening in the tip.

A collection reservoir is connected to the vacuum access opening via avacuum line for collection of the fluids and microabraded skin cells andis in turn connected to a vacuum source. A filter may be connectedinline between the collection reservoir and the vacuum source.

A method of performing microabrasion is provided which includes:applying a nonabrasive treatment tip to a skin surface; providingnegative pressure through an opening in the treatment tip to establish arelative vacuum; drawing a portion of the skin surface through theopening and into contact with an abrasive member; and moving thenonabrasive treatment tip over the skin surface and microabrading theportion of the skin in contact with the abrasive member.

Microabraded skin particles are collected through a vacuum conduitthrough which the negative pressure is provided. Fluid may be applied tothe skin though the opening in the treatment tip. In such instances, thevacuum conduit will also collect excess fluid.

The vacuum provided by the negative pressure surrounds a perimeter ofthe abrasive, moderately abrasive or nonabrasive conduit seal member. Ina microabrasion application, this makes it so that microabraded skinparticles are collected downstream of the abrasive member and from alllocations surrounding the abrasive member. In other applications (butalso in microdermabrasion), such an arrangement assists in the abilityto move the device in any direction over the skin. The symmetric natureof the configuration avoids such need as experienced with otherimplements that have a certain directionality requirement (i.e., theymust “point” in their direction of travel). In a microdermabrasionapplication, the inventive device configuration provides for applyingnot only any abrasive compounds as may be desired directly andimmediately at the spot of abrasion, but also (or alternatively) othersolutions or compounds offering various benefits.

These and other objects, advantages, and features of the invention willbecome apparent to those persons skilled in the art upon reading thedetails of aspects of the invention as more fully described below.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete understanding of the devices, system, and methodsaccording to the present invention may be obtained by referring to thefollowing detailed description together with the accompanying drawingsbriefly described hereinafter. Comparable elements in the figures sharethe same or similar numbering.

FIG. 1A is a partially exploded view of a microabrasion or skintreatment device according to the present invention.

FIG. 1B is a detail of a portion of the device in FIG. 1A.

FIG. 2 is a partially exploded view of a microabrasion device with a tipof the device removed.

FIG. 3 is a view of an assembly including a vacuum head base and cannulawith abrasive member according to the present invention.

FIG. 4 is a view of a vacuum head base according to the presentinvention.

FIG. 5 is a view of a cannula with abrasive member according to thepresent invention.

FIG. 6 is a schematic of a microdermabrasion system according to thepresent invention.

FIGS. 7A-7C show views of an alternate microabrasion or skin treatmentdevice according to the present invention.

FIG. 8A provides views of a panel of sealing and tissue abutmentmembers.

FIG. 8B shows readable media which provides instructions for using thepanel of sealing and tissue abutment members.

DETAILED DESCRIPTION OF THE INVENTION

Before the present device, system and methods are described, it is to beunderstood that this invention is not limited to particular structuresdescribed, as such may, of course, vary. It is also to be understoodthat the terminology used herein is for the purpose of describingparticular embodiments only, and is not intended to be limiting, sincethe scope of the present invention will be limited only by the appendedclaims.

Where a range of values is provided, it is understood that eachintervening value, to the tenth of the unit of the lower limit unlessthe context clearly dictates otherwise, between the upper and lowerlimits of that range is also specifically disclosed. Each smaller rangebetween any stated value or intervening value in a stated range and anyother stated or intervening value in that stated range is encompassedwithin the invention. The upper and lower limits of these smaller rangesmay independently be included or excluded in the range, and each rangewhere either, neither or both limits are included in the smaller rangesis also encompassed within the invention, subject to any specificallyexcluded limit in the stated range. Where the stated range includes oneor both of the limits, ranges excluding either or both of those includedlimits are also included in the invention.

Unless defined otherwise below, all technical and scientific terms usedherein have the same meaning as commonly understood by one of ordinaryskill in the art to which this invention belongs. Although any methodsand materials similar or equivalent to those described herein can beused in the practice or testing of the present invention, the preferredmethods and materials are now described. All publications mentionedherein are incorporated herein by reference to disclose and describe themethods or materials, or combination, in connection with which thepublications are cited.

It must be noted that as used herein and in the appended claims, thesingular forms “a,” “and,” and “the” include plural referents unless thecontext clearly dictates otherwise. Thus, for example, reference to “avacuum tube” includes a plurality of such vacuum tubes and reference to“the vacuum tube” includes reference to one or more vacuum tubes, toinclude a plurality of tubes interconnected in series, and equivalentsthereof known to those skilled in the art, and so forth. Moreparticularly, it is also understood that if an element is described asbeing connected to a vacuum source, that this description also includesthe element being connected to an intermediate element, such as a tubeor a filter, which is in turn connected to the vacuum source.

The publications discussed herein are provided solely for theirdisclosure prior to the filing date of the present application. Nothingin this application is to be construed as an admission that the presentinvention is not entitled to antedate such publication by virtue ofprior invention. Further, the dates of publication provided may bedifferent from the actual publication dates which may need to beindependently confirmed.

The present invention provides the ability to perform microdermabrasionwith or without flowing abrasive particles to be applied to the skin,with the ability to pretreat or condition the skin prior tomicroabrading it. The present invention further provides more efficientand complete removal of microabraded particles with the envelopingarrangement of the vacuum and, optionally, fluid flow that surrounds anabrasive member provided. Furthermore, the invention provides forapplication of therapeutic formula, in aid of microabrasion or for itsown purpose.

The term “tube,” “tubular,” or “conduit” refers to a structure having ahollow, bore or through passage, or other passageway, substantiallyaligned along a longitudinal axis of the structure and which may havevarious cross sections. Thus, these terms refer not only to a commontube having a circular cross section with a central opening, but also toother structures including those having square, elliptical, ornongeometric and even irregular cross sections, which include such apassageway.

The term “tip” refers to the end of a structure or assembly. As usedherein, the applicator tip is that component, whether integral orattachably fixed to the device, which is the endmost extremity of thedevice and is used in contacting the skin.

A “vacuum line” as used herein is a tubular structure that interconnectsother components of the system so as to form a vacuum pathwaytherebetween.

FIG. 1A shows a partially exploded view of a microabrasion or skintreatment device 10 according to the present invention. A portion of thesame is detailed in FIG. 1B. Device 10 is designed to be handheld by auser for its application to the skin of a patient in the performance ofmicrodermabrasion or other vacuum therapy applications. As such, it maybe designed with an elongated handle 12 to facilitate grasping by auser. One of ordinary skill in the art will appreciate that manydifferent shapes and materials may be employed for the handle 12 and thepresent invention is not to be limited to an elongated, substantiallycylindrical handle 12 as shown. In the example of FIG. 1, handle 12 ismade of plastic, such as nylon or other plastic having sufficienttoughness and mechanical strength, but may also be made of metal, suchas stainless steel, for example, or ceramics or composites. Handle 12 isannular or tubular, providing a passageway 12 a through which tube 14 isextended.

Tube 14 is adapted to be connected at its proximal end 14 a (the endextending away from handle 12) to a fluid reservoir 70 (described belowin reference to FIGS. 6 and 8A) which is in turn, open to atmosphere.Tube 14 is flexible and may be made of PVC or other compatible plastic,for example. Similarly, all other vacuum lines described herein areflexible to afford maneuverability to device 10 and may be made of PVCor other compatible plastic. Alternatively, the proximal end of tube 14can be left open to atmosphere or connected to a flow control valve orfilter, or both, with or without connection to fluid reservoir 70. Thedistal end 14 b of tube 14 is connected to cannula 16. Cannula 16 isadapted to be fixed to handle 12 and may be machined from metal such assurgical stainless steel or may be machined or molded of plastic or castor molded from ceramic. Cannula 16 runs through the center of thehandpiece

Vacuum head base 18 is fitted over functional block 16, as shown in FIG.3, for example, to form a pressure tight seal therewith. Vacuum headbase 18 may be machined from machined from metal such as surgicalstainless steel or may be machined or molded of plastic or casted ormolded from ceramic. Vacuum head base 18 may be frictionally fit overfunctional block 16 with a seal being effectuated by positioning of oneor more O-rings 16 b (see FIG. 5) or other sealing members betweenfunctional block 16 and vacuum head base 18.

A treatment tip 20 is fitted over the end of vacuum head base 18, and,likewise may be friction fit or provided with threads or otherattachment means, or any combination of these, to provide a pressuretight fit between the components. The tip is smooth surfaced and adaptedto glide over the skin surface for application of lotions or vitamins,or both, or other fluids thereto during processing. The tip may be madeof plastic such as nylon or glass, such as pyrex, for example and ispreferably, although not necessarily transparent or translucent. Atransparent tip allows better visualization by the operator duringprocessing. One or more O-rings 18 a (see FIG. 4) or other sealingmembers may be provided between vacuum head base 18 and tip 20 tofacilitate the pressure tight seal. Alternatively, tip 20 may beintegrally machined or molded with vacuum head base 18. Tip 20 includesan opening 20 a which targets an area of skin to be contacted (e.g., tobe microabraded) when tip 20 is applied to the skin. Although shown witha single large opening 20 a, it is conceivable that tip 20 could beprovided with more than one opening to perform a similar function asdescribed below, in which case, multiple skin-opposing surfaces may beprovided.

Functional block 16 is a tubular structure that is configured to matewith vacuum head base 18. Vacuum head base 18 is also a tubularstructure which has a significantly larger inside diameter than theoutside diameter of the distal portion of functional block 16, so as toform an annulus 22 therebetween. Tip 20 extends the annular space 22, asshown in FIG. 1. A passageway 16 c runs the full length of functionalblock 16 and forms a continuation of the flow path defined by tube 14when tube 14 is connected to the proximal end of functional block 16. Atip member 24 (e.g., abrasive members 24A, 24B, or 24C or nonabrasivemember 24D of FIG. 8A) is formed at the distal end of functional block16 thereby closing off the passageway 16 c at the distal end offunctional block 16. The abrasive member 24A, 24B, or 24C is formed byfusing abrasive particles to the end of the functional block 16, orcould alternatively be made as an abrasive disk and fitted within anopen end of the functional block to seal the end or mounted to a closedend of a functional block 16. Other removable and or replaceableconfigurations are possible as well.

The invention may also employ a nonabrasive member 24D that creates aseal due to the vacuum created from vacuum head 18. Such an alternativeend configuration is best indicated in FIG. 1B by way of a hashed linetip 80 where abrasive material would otherwise be set. Like the abrasiveend feature of device 10, a less abrasive sealing portion 24C ornonabrasive sealing portion 24D may be provided as a removable orreplaceable member or segment. This potential is illustrated by virtueof dashed line 82 indicating a possible separation line between the mainbody of block 16 and sealing portion 24 (FIG. 1).

Although the abrasive or nonabrasive sealing member shown issubstantially planar, it may alternatively be rounded, flared, concave,convex, or elongated, for example. For an abrasive tip, the abrasiveparticles are generally of a size ranging from about 50 to 300 grit,typically about 100 to 120 grit and are typically carborundum (aluminumoxide) or sodium bicarbonate, or the like. The coarser particles (at thelower ends of the grit ranges) may be provided for use in initialtreatments, while finer particles (at the higher ends of the gritranges) may be employed for subsequent treatments. Alternatively, theabrasive member may be formed by knurling, machining, laser treatment,or otherwise mechanically or chemically treating a closed end of thefunctional block or cannula end as discussed below.

As shown in FIG. 8A, in some instances it may be desired to provide akit or panel 90 of abrasive and nonabrasive sealing members 24A, 24B,24C, and 24D that vary from most abrasive to smooth or substantiallysmooth (or nonabrasive) that are fitted at the end of functional block16. These may be intended for sterilization and repeated use or asdisposables. Threadings 92 may be utilized to attach any of the sealingmembers 24A-24D to the device. The length “L” of such members may vary,as may other dimensions. However, the length will generally becoordinated with that of the member to which it is attached in orderthat the surface (abrasive or nonabrasive) will form a limiting surfacefor tissue drawn into tip opening 20 a. Such contact is obviouslynecessary to enable dermal abrasion. It is also useful in the context ofvacuum massage application in order to avoid drawing tissue too far intoopening 20 a such that it is bruised or otherwise damaged.

As shown in FIG. 8B, instructions as to treatment regimen or proceduresin connection with the inventive hardware may be provided on anyreadable medium 100, including paper stock or a computer readablemedium, or combination of these. Both the panel and instructions may beprovided in packaged combination alone or with such other hardware asshown in the figures to provide a kit. Alternatively, the end-piece kit90 may be provided separately though they are shown associated in FIGS.8A and 8B.

One or more openings 16 d are provided through the wall of the distaltubular structure of functional block 16 to establish one or more flowpathways between passageway 16 c and annulus 22. Tip 20 extends beyondthe extremity of functional block 16 such that member 24 is positionedinternally of the assembled device 10, and surrounded by annulus 22.

An opening or port 18 b is provided in vacuum head base 18 forconnection of a vacuum source, for example, by connecting the vacuumport 18 b to the vacuum source via a vacuum line. When vacuum is appliedthrough opening 18 b an opening 20 a is sealed off, for example byplacing it up against skin tissue, a closed loop vacuum flow path isestablished between the vacuum source and connecting line, vacuumopening 18 b, annulus 22, opening or openings 16 d, passageway 16 c andtube 14. This flow path is shown in FIG. 1.

FIGS. 7A-7C show an alternative construction of the microdermabrasiondevice. Whereas the previous device 10 utilized a separate handle 12 andvacuum head base 18, these elements are integrated in device 10′ inelement 110. Still further, in the variation of the wand shown in FIGS.7A-7C (especially as illustrated in FIG. 7C by virtue of the use ofhidden line) a separate functional block 16 and line 14 within thehandle may be abandoned in favor of a single tube or cannula 120. Thismember—closely fit within the integrated handle section 12′ but leavingspace within the integrated vacuum base region 18′—preferably comprisesstainless steel and includes threaded end sections to receive a threadedend fitting 112 and threadings 92 of a member 24 that acts as a stop.Naturally, other materials and constructional options such aspress-fitting, bonding, welding, and so forth may be employed as tothese referenced elements. However, the connector is preferably a quickconnect/disconnect fitting as shown enabling simple separation,sterilization, or swap-out, or combination of these. Of course, othervariations in the microdermabrasion device or wand configuration arepossible as well.

FIG. 6 shows an example of a microdermabrasion system 30 according tothe present invention, which incorporates device 10 or 10′ (though onlydevice 10 is shown). Vacuum opening 18 b is connected with a vacuumsource 40 as described above, by vacuum line 42. A collection reservoir50 and, optionally, an inline filter 60 are connected in the vacuum linebetween device 10 and vacuum source 40. Vacuum line 42 connects to aninput 52 to collection reservoir 50 via elbow 54, for example, andoutput 56 connects with a second vacuum line 44 via elbow 58, forexample. A manifold cover 59 sealably interfaces the input (52, 54) andoutput (56, 58) connections with a reservoir 51 which is typically a jarmade of glass or plastic for example. An extension tube 53 connects withinput 52, 54 and extends into the reservoir 51 to ensure effectivedelivery of waste materials (abraded skin particles and, optionally,fluids) to reservoir 51.

Optionally, a back-up filter 60 may be provided inline between vacuumlines 44 and 46 as added insurance that no or substantially no fluid,skin particles, abrasive particle or other materials being collected bycollection reservoir 50 can be transported to vacuum source 40. Filter60 may be an in-line condensation filter, such as water condenserproduced by Wilkerson Labs and available as part number F0001-000 fromNor-Cal Controls, Inc. of Santa Clara, Calif.

The vacuum source may be the same as that provided for currentlyexisting microdermabrasion devices, such as the ProPeel, MDPeel, oriPeel, for example, each available from emed, Inc., Westlake Village,Calif. A power switch is used to activate the vacuum source and a vacuumin the range of about 2 to 14 pound per square inch (psi) is generallyused during a procedure, depending upon the skin condition of the personbeing treated.

Tube 14 extends from the proximal end of the microdermabrasion device10, and connects with output 72 of fluid reservoir 70 via elbow 74, forexample. A breather line 76 may be connected inline via T-joint 76′, forexample, or other interconnection, and includes an adjustable valve 78or other means for varying an amount of air that is allowed into thetube 14. This feature not only allows the amount of vacuum to beadjusted for a given fluid, but allows fluids having differentviscosities to be applied at the same vacuum level, since differentviscosities will require varying amounts of air to be inletted throughthe breather line, to give a constant vacuum level. Alternatively, abreather line or input with adjustment valve may be located on elbow 74or directly on manifold cover 79. Still further, a valve or other flowcontrol mechanism may be provided in the fluid delivery line 14 tocontrol the amount of liquid passing through the line. This feature canbe provided alternatively, or in addition to the breather line discussedabove. An input is provided in manifold which is open to atmosphere toprevent vacuum buildup in reservoir 70. A manifold cover 79 sealablyinterfaces the input output (72, 74) connections with a reservoir 71which is typically a jar made of glass or plastic, for example, andcontains lotions, vitamins or other skin treatment fluids, orcombination of these, to be applied to the skin through tip opening 20a. An extension tube 73 connects with output 72, 74 and extends into thereservoir 71 to near the bottom of the reservoir to ensure that most allof the contents of reservoir 71 are capable of being delivered throughthe system.

Abrasive particles, such as corundum crystals, sodium bicarbonateparticles or other abrasive particles, including those disclosed in U.S.Pat. No. 5,971,999 (which is hereby incorporated in its entirety byreference thereto), for example may be included in reservoir 71 fordelivery through the system to perform a microabrading function,although this is not the preferred configuration of the presentinvention, as sufficient microabrasion may be accomplished via abrasivemember 24. If used, the abrasive particles may be used together with anyof the fluids mentioned above or with some other fluid carrier medium,such as those described in U.S. Pat. No. 5,971,999, for example.

Reservoir 70 may contain solution or a suspension for purposes otherthan abrasion or pure abrasiveness. General examples, types orcategories of compounds, or combination, that may be employed include:beaching formulations (e.g., 2-4 percent hydroquinone, 2 percent Kojicacid, 1 percent vitamin K, and 1 percent hydrocortisone in a aqueousbase); acne treatment formulations (e.g., salycilic acid, alcohol basebuffered by witch hazel, etc.); fine lines/wrinkle treatmentformulations (e.g., hyaluronic acid is an aqueous base); hydratingformulations (e.g., calendula, vitamins A, D, or E, or any combination,in a mineral oil base); antioxidant formulations/free radical;scavengers (e.g., vitamins A, E, and K in a mineral oil base). Otherexamples of product categories that may be employed alone or incombination with other compounds include, antiseptics, astringents,cleansers, pore decongestants, balms, botanicals, collagen stimulators,herbs, microemulsifiers, oxygen delivery vehicles, proteins, serums,skin firming agents, toners, topical anesthetics, and tyrosinaseinhibitors. Individually named products as may be used (with associatedbenefit indicated parenthetically) include: aloe vera (calming); alphahydroxy acids (peel); alphalipoic acid (antioxidant); benzoil and otherperoxides (acne); ceramide (hydrator); copper (toning); copper peptide(toning); CoQ-10 (coenzyme Q-10) and other enzymes (toning); cortisone(calming); glycolic acids (peel); hyaluronic acid (collagenstimulation); hydrolipids (hydrator); hydroquinones (bleaching); lacticacids (peel); magnesium ascorbic phosphate (free radical scavenger,collagen stimulator, bleaching); niacin (vascular dilation);phospholipids (moisturization); potassium (toning, psoriasis), andsalycilic acids (acne). Of course, any combination of such elements maybe provided—even in connection with abrasive particles.

Note, however, the present system may be used by eliminating the fluidreservoir 70 altogether, where microdermabrasion is performed in a “drystate” and tube 14 is simply left open to atmosphere, with or without afilter or valve, or combination, for adjusting the amount or flow rateof air that is allowed into tube 14. Similarly, dry or externallylubricated vacuum massage of tissue may be accomplished in instanceswhere a nonabrasive sealing member 24D is employed.

For use in microdermabrasion, device 10 is positioned so as to place tip20 in contact with the skin surface to be microabraded and the vacuumsource is turned on to establish a vacuum within the system 30. Itshould be noted here that the order of positioning and turning on thevacuum is not critical as the vacuum can be turned on prior tocontacting the tip 20 with skin, since the vacuum loop will not beclosed until such time that opening 20 a is sealed by the skin.

Upon forming the vacuum loop as described above, the fluid contents influid reservoir 70 are drawn through tube 14 and into device 10 wherethey flow out of the cannula 16 through openings 16 d and are applied tothe skin. A targeted area of the skin (which is defined by the perimeterof the opening 20 a is drawn up into the tip 20 and a central portion ofthe targeted area of skin is drawn into contact with abrasive member 24,while portions of the targeted area surrounding the central portion aretreated with the fluid contents. As the user or operator of the device10 glides the tip 20 over the surface of the skin, the targeted area incontact with the abrasive surface 24 is scraped over the abrasivesurface where microdermabrasion of that portion of the skin isperformed. Continued movement of the tip over the skin likewisecontinues the microdermabrasion of the targeted area, which changesalong with the movement of the tip.

Advantageously, since the flow of fluids surrounds the area of skinbeing microabraded, the skin is both pretreated and posttreated with thevitamins, lotions, etc. contained in the reservoir 70. Pretreatment cansoften the area of skin treatment to be microabraded, thereby renderingexfoliation more complete and easier to accomplish with less trauma tothe skin tissues left behind, while posttreatment helps to reducestreaking and redness of the skin tissues left behind.

As the flow of the fluids continues out of the vacuum head base and intovacuum line 42, it carries with it the exfoliated skin particles and anyother waste that is removed through the microdermabrasion process. Sincethe fluids surround the abrasive member 24, they are very effective intaking up substantially all of the particles that are loosened duringthe microdermabrasion process, in contrast with prior art mechanismshaving a abrasive tip that can only vacuum up particles from the leadingportion of the tip (through a central opening through the abrasive tip),while all of the particles that are loosened or freed up by the trailingside of such a tip (i.e., that portion of the abrasive tip that isbehind the central opening with respect to the direction of movementover the skin) are left behind.

When the invention is to be employed for vacuum massage and treatmentwith a nonabrasive tissue-opposing surface, the procedure issubstantially the same. However, the motion employed in use may differ,as may the areas of coverage. Particularly, more sensitive areas such asthe lips may be more appropriately targeted than would otherwise be thecase.

Although the abrasive or nonabrasive member 24 and cannula 16 describedherein are example of constructing the device according to the presentinvention, it is noted that they need not be constructed in this exactmanner, as other configurations could be assembled to carry out theinvention as described. For example, an abrasive or nonabrasive membersimilar to that described, could be mounted to the inner walls of avacuum head base with several spokes, while still maintaining an annulussubstantially around the perimeter of the abrasive member, with theremainder of the cannula then simply being replaced by an extension oftube 14.

Also, the abrasive or nonabrasive member could be formed in differentshapes such as square or any other shape that substantially maintains anannulus or other flow paths that would substantially surround theabrasive member with fluid flow as described. Still further, theabrasive or nonabrasive member could be mounted in the vacuum head baseso as to allow flow channels only over upstream and downstreamperimeters of the same, while leaving no openings along the sideperimeters of the abrasive or nonabrasive member which could be weldedor otherwise sealed against the inner walls of the vacuum head base.Such a configuration would still allow leading edge and trailing edgeuptake of microabraded skin particles and/or liquid that is deliveredwithin annular space 22. However, an annulus or other flow configurationwhich flows over substantially the entire perimeter of the abrasivemember is preferred. Such a configuration is particularly more effectivewhen circular movements of the tip 20 over the skin are applied. Indeed,it is efficacious in situations where movement in changing directions isdesired since the instrument is not “pointing” in any particulardirection as may be the case with other devices.

While the present invention has been described with reference to thespecific embodiments thereof, it should be understood by those skilledin the art that various changes may be made and equivalents may besubstituted without departing from the true spirit and scope of theinvention. In addition, many modifications may be made to adapt aparticular situation, material, composition of matter, process, processstep or steps, to the objective, spirit and scope of the presentinvention. All such modifications are intended to be within the scope ofthe claims appended hereto.

The invention claimed is:
 1. A method comprising: applying a treatmenttip to a skin surface, wherein the treatment tip is removably coupled toa distal end of a handle; providing a suction through at least oneopening of the treatment tip to establish an annular region of thesuction, wherein the annular region at least partially surrounds asmooth surface, wherein the smooth surface is substantially planar andis coupled to the distal end; drawing a portion of the skin surface intocontact with the smooth surface using the suction; providing a fluid tothe skin surface to an area inside a periphery of the smooth surface,wherein the fluid passes from a proximal end of the handle to the distalend; and moving the treatment tip over the skin surface.
 2. The methodof claim 1 further comprising removing and replacing the treatment tipwith another treatment tip comprising an abrading surface.
 3. The methodof claim 1 wherein the fluid comprises a hydroquinone.
 4. The method ofclaim 1 wherein the fluid comprises 2-hydroxymethyl-5-hydroxy-γ-pyrone.5. The method of claim 1 wherein the fluid comprises vitamin K.
 6. Themethod of claim 1 wherein the fluid comprises a2-methyl-1,4-naphthoquinone derivative.
 7. The method of claim 1 whereinthe fluid comprises magnesium ascorbyl phosphate.
 8. The method of claim1 wherein the fluid comprises hydrocortisone in an aqueous base.
 9. Themethod of claim 1 wherein the fluid comprises tyrosinase inhibitors. 10.The method of claim 1 wherein the fluid comprises a bleachingformulation.
 11. The method of claim 1 wherein the treatment tipcomprises a first length L1 and the method further comprises: replacingthe treatment tip of length L1 with another treatment tip comprising asecond length L2, wherein L2 is a different length than L1, and a lengthof the treatment tip limits an amount of the skin surface that is drawntoward the at least one opening of the treatment tip.
 12. The method ofclaim 1 wherein the treatment tip comprises a first length L1 and themethod further comprises: replacing the treatment tip of length L1 withanother treatment tip comprising an abrasive surface and a second lengthL2, wherein L2 is a different length than L1, and a length of thetreatment tip limits an amount of the skin surface that is drawn towardthe at least one opening of the treatment tip.
 13. The method of claim 1wherein the drawing a portion of the skin surface into contact with thesmooth surface using the suction comprises: causing the skin surface toelevate with respect to surrounding skin.
 14. A method comprising:applying a treatment tip to a skin surface, wherein the treatment tip isremovably coupled to a distal end of a handle; providing a suctionthrough at least one opening of the treatment tip to establish anannular region of the suction, wherein the annular region at leastpartially surrounds a smooth surface, wherein the smooth surface issubstantially planar and is coupled to the distal end; drawing a portionof the skin surface into contact with the smooth surface using thesuction, wherein the portion of the skin surface drawn into contact withthe smooth surface becomes elevated with respect to surrounding skin;providing a fluid to the skin surface to an area inside a periphery ofthe smooth surface, wherein the fluid passes from a proximal end of thehandle to the distal end; and moving the treatment tip over the skinsurface.
 15. The method of claim 14 wherein the treatment tip comprisesa first length L1 and the method further comprises: replacing thetreatment tip of length L1 with another treatment tip comprising asecond length L2, wherein L2 is a different length than L1, and a lengthof the treatment tip limits an amount of the skin surface that is drawntoward the at least one opening of the treatment tip.
 16. The method ofclaim 14 further comprising removing and replacing the treatment tipwith another treatment tip comprising an abrading surface.
 17. Themethod of claim 14 wherein the fluid comprises a hydroquinone.
 18. Themethod of claim 14 wherein the fluid comprises2-hydroxymethyl-5-hydroxy-γ-pyrone.
 19. The method of claim 14 whereinthe fluid comprises a 2-methyl-1,4-naphthoquinone derivative.
 20. Themethod of claim 14 wherein the fluid comprises hydrocortisone in anaqueous base.